President Donald Trump used one of the flurry of executive actions that he issued on his first day back in the White House to begin the process of withdrawing the U.S. from the World Health Organization for the second time in less than five years — a move many scientists fear could roll back decades-long gains made in fighting

Trump signed a slew of executive orders that initiated the US withdrawal from the Paris climate accords and WHO, ordered troops to the border with Mexico, pardoned about 1,500 January 6 rioters and restarted permitting for natural gas export terminals. He also rescinded 78 Biden-era directives.